I specialize in repairing water damages caused by leaking of showers and toilets.
A list of products that i often use for various tile and grout installations:
Grout Boost or other admixture.
GE Kitchen and Bath 30 minute shower ready silicone caulking Advance or Supreme
Ditra uncoupling layer/membrane
Upon request I may use a grout color match caulking where minimal water exposure exists.